Emergency cut-off.



M. J. MGINTYRE.

EMERGENCY CUT-OFF.

APPLICATION FILED MAR.8,1913.

1,090,221 Patented Mar. 17, 1914.

2 SHEETSSHEET l.

W[T.NESSES aid/J INVENTOR wwwj f TATEb PAENT @Fiiltttj at,

MILFORD T. MGINTYRE, OF GOWANDA, NEvV YORK.

EMERGENCY CUT-OFF.

.ildltlthim To (ZZZ tr/wm it may concern Be it known that I, Minnow) .l i Molnrrna, a citizen of the United States, residing at tlowanda in the county ot' (ilatlaraugus and State ol New York, have invented certain new and useful Improvements in Emergency (lut Olls, of which the following is a specification reference being had therein to the accompanying drawing'.

This invention relates to safety valves :t'or pipe lines and has for its object the production of a simple and etlicient emergency shut-oft which will automatically close the valve as soon as the pressure passing througlii the pipe has been reduced below a predetermined point.

Another object of this invention is the prodiurtion ot' a simple and eliicient means whereby the valve may be allowed to operate and also whereby the valve may be thrown out of operation.

lVitlii these and other objects in view, this invention consists of certain novel constructions, combinations and arrangements of parts, as will be hereina't'ter fully described and claimed. y

In the drawings :-Figure 1 is a perspective view of the valve. Fig. 9 is a central vertical section thereof. Fig. 3 is a horizontal section taken on line 3-3 of Fig. 2. Fig. i is a detail perspective of the supporting bracket for the diaphragm casing.

13y referring to the drawings, it will be seen that l designates the inlet valve easing which carries at its upper end a discharge compartment 2. This discharge compartment 2 terminates in a discharge pipe 3 which extends laterally oi. the discharge (-on'ipartl'nent 2. A cover plate t is bolted upon the upper end of the discharge coinpartn'ient 2 and is secured thereto by means of bolts passing through the laterally ex tending 'langes 6 formed upon the compartment 2. The cover plate is provided with a centrally arranged upwardly extending collar 7 through which passes the valve stem 8. A packing 9 is placed within the collar 7 and held in a set position therein by means of a plug 10.

n valve seat 11 is interposed between the discharge compartment 2 and the inlet valve casing 1 and this valve seat is provided with an aperture 12 which aperture adapted to be closed by means of a valve 13. The valve 13 is supported upon the stem 8 Specification of Letters Patent.

Application fi1ed March 8, 1913.

.fa tented Mar. Elli, illil Serial No. 752,936.

and this stem 8 works through a bridge 1i formed in the inlet valve casing 1. A coil spring to is positioned upon the stem 5% and normally exerts an upward pressure upon the valve l3 to 'lorce the valve upon its seat when the pressure ol? the air, gas. or liquid passing through the casing is reduced below a 1iredetermined point.

A. diaphragm casing 16 is supported above the inlet casing 1 and this diaphragm easing comprises an upper and a lower section having laterally extending llanges 17 which [langes are lirmly held together by means oi the bolts la. The diaphragm (as ing to is suspemled from a connecting pipe 15) by means o'l. a T-joint 20. A. diaphragm disk Ql is carried within the casing between the llanges l7 ole the diaphragm ill. The diaphragm it engages the head .22 and this head 22 is connected to the rod 9 and it will be seen that as the pressure passes through the pipe ll) and T-joint 20 into the diaphragm casing 16 the same will act upon the diaphragm disk 21 and force the stem 8 downwardly and remove the valve l3 jlirom the valve seat 11, thereby opening the apertore l2 and allowing the air, gas, or liquid to pass through the, casing l, discharge compartment 2, and dischaige pipe A comnnmicaling pipe 2;) is secured to the connerting casing 1 and to the supply pipe 119 and this connmmicating pipe 9 carries a valve Qlso that the passage through the pipe 21) may be closed when so desired. i\ return pipe 25 is also engaged by the pipe l5) and connnunit-ates with the tllsliilllll'g'fl pipe 3 and this pipe L5 also can ries a valve 3h which may control the passage through this pipe 25.

A. supporting bracket 97 is secured to the top plate 4t near the outer edge lhereolf and also engages the diaphragm casing to under the valve 17 oi. one ol the sections. This bracket 27 is provided with laterally extending Feet 28 at each end thereoil, which :tect

constitute means 'lor firmly securing the bracket to both the plate l: and the diaphragm casing 10. ll; will be seen that the vertical portion of the bracket 97 will en gage the edge of the diaphragm casing 16 and thereby constitute an eliicient support or brace for the diaphragm casing and prevent the same from swinging laterally and out oi alinement with the plate 4t whicln it this lateral swing were allowed, would be likely to cause the valve stem 8 to become twisted and hence prevent the same from working. This brace 27 will, therefore, constitute a very eliicient means for anchoring the diaphragm casing 16 in a set position and relieve the strain from the supply pipe 19.

When the device is in operation, the valve 26 is closed and the air, or liquid which is passing through the apparatus will pass up from the supply casing 1 through the communicating pipe 23 to the pipe 19 and into the diaphragm casing 16 thereby act ing upon the diaphragm 21 and forcing the valve 13 out from the valve seat 11 thereby allowing the material, air, gas or liquid, to pass through the valve stem and finally be discharged trom the discharge pipe 3.

In case it should be found that it is necessary to repair the valve or apparatus, the valve 2% in the communicating pipe 23 is closed and the valve in the pipe 25 is opened by allowing the pressure within the diaphragm casing 16 to be relieved from the diaphragm and pass out through the pipe 25 and the discharge pipe 3. As the pressure is in this manner relieved, the spring will force the valve 13 to a closed position upon the seat and prevent the further escape of gas, air or liquid passing therethrough.

It should be understood that the present catch or valve, is adapted to be used upon high or low pressure lines for gas, steam, air and water.

The principal object of the invention as above stated is to produce an eilicient shutoii' which will automatically hold the valve in an open position to permit the passage of air, steam or water therethrough when the pressure reaches a predetermined point. It should be further understood that should it be desired to hold the valve in an open position the air, gas, water or steam, which may be used in connection with the valve may be allowed to pass through the pipe 19 into the casing 16, and by securing the desired pressure therein and closing the valves land 26 the pressure may be so retained as to hold the valve 13 from its seat and is claimed as new, is

fin automatic valve comprising a casing, a diaphragm casing su nport-ed above said first mentioned casing, a diaphragm carried therein, a plunger rod extending through both of said casings, a head engaging the lower face of said diaphragm, a valve disk carried by said plunger rod, means for normally exerting an upward pressure'upon said valve disk for holding the same in a closed position, a communicating pipe for constituting a communication between said diaphragm casing and said first mentioned casing, a valve carried by said pipe for opening and closing the passage therethrough, a second pipe, said first mentioned casing comprising an inlet casing and a discharpe compartment, said first mentioned pipe communicating with said inlet casing, said second pipe communicating with said discharge compartment, a valve carried by said second pipe for controlling the passage from said diaphragm to said discharge com part-merit, and said diaphragm casing being suspended by said first and second mentioned pipes, and said valves carried by said first and second pipes adapted to facilitate the confining of material or gas in said diaphragm casing for holding said valve disk in an open position.

In testimony whereof I hereunto aiiix my signature in presence of two witnesses.

MILFORD J, llEclNlYRE. Witnesses d. FLORENCE Srnann, Lrsr-n B. SPELLMAN.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, fifashington, 3). C. 

